A dynamic damper is attached to a vibrating structure and controls the vibration of specific frequencies of the structure.

The principle of a dynamic damper is that a weight resonates and absorbs the vibration energy of a structure alternatively. These are used at various places including the steering wheel, the auto body, brackets and the exhaust.

Reduce vibration of the specific frequency domain of an oscillating object.
(Steering , Body, Bracket, exhaust, applied to various kinds of vibration portions. )